docs: simplify README and remove FreeBSD support

- Strip README to essentials with wiki references only
- Remove non-existent API docs and troubleshooting links
- Focus on quick start and actual integrations (merkwerk)
- Remove FreeBSD support from all installation scripts
- Clean up platform detection logic in scripts
- Maintain OpenBSD and Linux support only

Reduces maintenance burden and aligns with actual project scope.

scripts/create-service.sh

@@ -15,25 +15,25 @@ if [ "$(uname)" = "OpenBSD" ]; then
         echo "Error: deployment/openbsd/rc.d-furt template not found"
         exit 1
     fi
-    
+
     cp deployment/openbsd/rc.d-furt /etc/rc.d/furt
     chmod +x /etc/rc.d/furt
     echo "furt_flags=" >> /etc/rc.conf.local
     rcctl enable furt
     echo "OpenBSD service created and enabled using repository template"
-    
+
 elif [ "$(uname)" = "Linux" ]; then
     # Use systemd template from repository
     if [ ! -f "deployment/linux/furt.service" ]; then
         echo "Error: deployment/linux/furt.service template not found"
         exit 1
     fi
-    
+
     cp deployment/linux/furt.service /etc/systemd/system/
     systemctl daemon-reload
     systemctl enable furt
     echo "Linux systemd service created and enabled using repository template"
-    
+
 else
     echo "Unsupported operating system for service creation"
     exit 1